Illustration of a heraldic rampant lion on hind legs, like those found on a coat of arms
Hello all, I have a Scrub Oak tree in my front yard, and I have St. Augustine underneath it. The grass is very thin and I was told that is because oak trees turn the soil acidic. I had lime put down last year but the grass still looks the same.ello all, I have a Scrub Oak tree in my front yard, and I have St. Augustine underneath it. The grass is very thin and I was told that is because oak trees turn the soil acidic. I had lime put down last year but the grass still looks the same.
Acidifying soil must be repeated annually and is not effective when tree roots spread beyond the treated area. The ideal pH range for plants that need acidic soil is 4.0 to 6.5. Proper planting is critically important if you want healthy, vigorously growing trees and shrubs. Dig a hole twice as wide as the rootball. If you're planting a tree or shrub with a main trunk, gently brush soil away from the stem to find the first root closest to the soil surface.